Question

Create an angle of ${120}^{\circ }$ by using angle bisection while also using protractor. [2 MARKS]

Answer 1

Steps : 1 Mark
Construction : 1 Mark

Steps:
1. Draw line segment OA of any appropriate length.
2. Draw an arc of any radius with O as centre. Let the arc intersect OA at B.
3. With B as centre draw arc of same radius which intersect the earlier arc at C
4. With C as centres draw arc of same radius which intersect the first arc at D
5. Join OD. Angle DOA is ${120}^{\circ }$ .